देश आजादी के लिए शहीद हुए चार जवानों के नाम बताओ l
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देश आजादी के लिए शहीद हुए चार जवानों के नाम बताओ l
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Answer:
Multiplication of Decimals
1. Multiplication of a decimal number by a whole number:
- To multiply a decimal by a whole number, first multiply whole numbers by
ignoring the decimal point.
- Then, put the decimal point such that there are as many decimal places on the
right of the decimal point in the product as in the given decimal number that is
multiplied.
2. Multiplication of Decimal Number by 10,100 and 1000:
- When a decimal number is multiplied by 10, 100 or 1000, the digits in the
product are same as in the decimal number, but the decimal point in the product
is shifted to the right by as many places as there are zeroes over 1.
3. Multiplication of two decimal numbers:
- To multiply two decimal numbers, first multiply them as whole numbers.
- Place the decimal point in the product such that the number of decimal places in
the product is equal to the sum of the decimal places in the given decimal
numbers.
Exercise 2.6
Q1. Find
1. 0.2 * 6 =
* 6 =
= 1.2
2. 8 * 4.6 = 36.8
3. 2.71 * 5 = 13.55
4. 20.1 * 4 = 80.4
5. 0.05 * 7 =
* 7 =
= 0.35
6. 211.02 * 4 =
* 4 =
= 844.08
7. 2 * 0.86 = 1.72
(Show the method in all sums)
Q2. Find the area of a rectangle whose length is 5.7 cm and breadth is 3 cm.
Area of a triangle = Length * Breadth
Explanation:
= 5.7cm * 3cm
= 17.1 sq cm
Ans: Area of the rectangle = 17.1 sq cm
Q3. Find
1. 1.3 * 10 =
* 10 = 13 OR 13.0
2. 36.8 * 10 = 368 OR 368.0
3. 153.7 * 10 = 1537
4. 168.07 * 10 = 1680.7
5. 31.1 * 100 = 3110
6. 156.1 * 100 = 1561
7. 3.62 * 100 = 362
8. 43.07 * 100 = 4307
9. 0.5 * 10 = 5
10. 0.08 * 10 = 0.8
11. 0.9 * 100 = 90
12. 0.03 * 1000 = 30
Q4. (Write question from T.B)
Answer:
In 1 litre petrol, distance covered = 55.3 km
∴ in 10 litres of petrol, distance covered = ?
55.3km * 10 = 553.0 km
Answer: Distance covered = 553 km
Q5. Find
1. 2.5 * 0.3 =
*
=
= 0.75
2. 0.1 * 51.7 = 5.17
3. 0.2 * 316.8 = 63.36
4. 1.3 * 3.1 =
*
=
= 4.03
5. 0.5 * 0.05 = 0.025
6. 11.2 * 0.15 = 1.680
7. 1.07 * 0.02 =
*
=
= 0.0214
8. 10.05 * 1.05 = 10.5525
9. 101.01 * 0.01 = 1.0101
10. 100.01 * 1.1 =
*
=
= 110.011
(Show method in all sums)
Verified answer
Answer:
mangal pandey
bhagat singh
bal gangadhar tilak
khudiram bos
sukhdev thappar